I totally agree with you groundzero. In my late teens and early twenties I was on a shovel, pick and crowbar all day working for the railways. We were all skinny but had incredible stamina and we ate everything and anything. There were no fat people in the manual labour gangs.
Lack of continual physical movement and effort or what's referred to as a sedentary lifestyle doesn't help. We're meant to convert what we eat into energy by physical effort.
